<template>
  <div id="contsainer"></div>
</template>
<script>
export default {
  data() {
    return {
      viewer: null
    }
  },
  mounted() {
    this.initCesium()
    this.addPolylineColorAppearance(this.viewer)
  },
  methods: {
    initCesium() {
      this.viewer = new Cesium.Viewer('contsainer', {
        animation: false,
        baseLayerPicker: false,
        fullscreenButton: false,
        geocoder: false,
        homeButton: false,
        infoBox: false,
        sceneModePicker: false,
        navigationHelpButton: false,
        scene3DOnly: true,
        timeline: false,
        selectionIndicator: false, //是否显示选取指示器组件
        shouldAnimate: false, //自动播放动画控件
        shadows: true, //是否显示光照投射的阴影
        terrainShadows: Cesium.ShadowMode.RECEIVE_ONLY, //地质接收阴影
        sceneMode: Cesium.SceneMode.SCENE3D
      })
      this.viewer._cesiumWidget._creditContainer.style.display = 'none' //	去除版权信息
    },
    addPolylineColorAppearance(viewer) {
      let positions = [];
      for (let i = 0; i < 40; ++i) {
        positions.push(Cesium.Cartesian3.fromDegrees(-100.0 + i, 48.0));
      }

      let polyline = new Cesium.PolylineGeometry({
        positions: positions,
        width: 10.0,
        vertexFormat : Cesium.PolylineColorAppearance.VERTEX_FORMAT
      });
      let geometry = Cesium.PolylineGeometry.createGeometry(polyline);


      let polygonInstance1 = new Cesium.GeometryInstance({
        geometry: geometry,
        attributes : {//指定顶点的颜色
          color : Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(1.0, 1.0, 0.0, 1.0))
        },
        id: 'polygonInstance1'
      });


      let primitive = new Cesium.Primitive({
        geometryInstances: [polygonInstance1],
        asynchronous: false,//是否采用多线程
        appearance: new Cesium.PolylineColorAppearance({
          translucent: true//半透明
        })
      });

      viewer.scene.primitives.add(primitive);
    }
  }
}
</script>
<style scoped>
#contsainer {
  height: 100%;
  width: 100%;
  background-color: red;
}
</style>
